Ultraman Wiki

Leogon (レオゴン Reogon) was a Kaiju that appeared in episode 34 of Return of Ultraman.

Subtitle: Compatibility Monster (合性怪獣 Aishō Kaijū)


Return of Ultraman

Dr. Mizuno, a scientist that pushed the boundaries of biology and an old friend of Hideki Go, wanted to mix animal and plant DNA for science. The result was the monster Leogon, who was born from an egg in his laboratory. However, something went wrong, as Leogon quickly escaped and grew from two feet long to the size of a rhinoceros within a minute. MAT quickly tracked Leogon down to a lake where they attacked him. MAT did little except annoy the hybrid organism as his vines easily entangled them in midair. Hideki wanted to end the madness before someone was killed and quickly turned into Ultraman Jack. The two giants clashed, but Jack quickly outmatched Leogon and finished him off with the Ultra Spark, slicing him to pieces. The Life That Can't Be Forgiven


  • Leogon's roar is a recycled Zumbolar roar.
  • Designer: Maiya Jia Akira.
  • Leogon shares several traits with the Toho Kaiju Biollante, as both of them were created by the same man: Shinichiro Kobayashi. Both Kaiju are plant-animal hybrids that appear in stories with a "science gone too far" theme. Interestingly, Leogon was designed by concept artist Kako Yodane, who also submitted initial concept designs for Biollante to Toho, which are compiled in the book Godzilla vs. Biollante Completion. In Yodane's own 2014 art book, he revealed that his final form Biollante concept art was inspired directly by Leogon.
    • Curiously, the location where Jack and Leogon fight is the same location where Godzilla and Biollante fight for the first time, in Lake Ashi.



Leogon 0.jpg
  • Height: 2 ~ 30 m
  • Length: 2 ~ 50 m
  • Weight: 28,000 t
  • Origin: Mizuno Biological Laboratories (Hakone Lake)
Powers and Weapons
  • Growth: Leogon can grow from two feet long to 157 feet long in a matter of hours.
  • Adept Swimmer: Leogon can swim through water at low speeds.
  • Vine Tentacle: Leogon can use two large vines like tentacles from the tubes on his back. These tentacles are ideal for wrapping around targets.


Return of Ultraman


Return of Ultraman Kaiju
Takkong | Zazahn | Arstron | Sadola | Detton | Kingsaurus III | Gudon | Twin Tail | Gorbagos | Ghostron | Dangar | Stegon | Mognezun | Shugaron | Seamons | Seagorath | Eledortus | Terochilus | Bemstar | Sartan | Magnedon | Beacon | Gokinezula | Zanika | Vacuumon | Kupukupu | Kingstron | Zagoras | Nokogilin | Gronken | Varricane | Yadokarin | Oxter | Plooma | Alien Zelan | King Maimai | Alien Mates | Muruchi | Leogon | Pris-Ma | Draculas | Re-Seagorath | Re-Bemstar | Black King | Alien Nackle | Alien Varduck | Alien Black | Snowgon | Alien Baltan Jr. | Builgamo | Alien Stora | Paragon | Alien Grotes | Kodaigon | Granadas | Alien Centaurus | Robonez | Alien Cygnus-61 | Alien Messie | Alien Zoole | Red Killer | Femigon | Yametaranese | Sasahiller | Alien Ateria | Alien Mysteler | King Bockle | Alien Bat | Zetton II